The issue you're facing is a known problem with two-factor authentication (2FA), but there is a specific, official recovery process for it. It's not about contacting Meta directly, it's about proving you are who you say you are through an automated system.
Don't lose hope. Follow these steps precisely.
1. The Account Recovery Portal: Your First and Only Option
Forget trying to find a customer service number or a chat box. Meta's security protocol for this specific issue directs you to an identity verification portal.
On the login screen where it asks for the WhatsApp OTP, look for a link that says "Need another way to authenticate?" or "Having trouble?"
Click that link. It will take you to a page where Meta asks you to choose a different way to verify your identity.
You should see an option that says something like "I don't have access to my phone." Click that.
2. The Identity Verification Process
This is the most critical part of the process. Meta will now ask you to prove your identity by uploading a government-issued photo ID.
You will be prompted to submit a photo of your passport, driver's license, or national ID card. Make sure the ID is valid and not expired.
The name on the ID must match the name on your Facebook account as closely as possible.
Make sure the photo is clear, well-lit, and shows all four corners of the ID. Avoid glare.
After you submit this, the system will begin the verification process.
3. Awaiting and Responding to Meta
Once you've submitted your ID, you have to wait for a response.
Meta will send a response to the email address that is tied to your Facebook account.
Check that email address constantly, including your spam and junk folders. The message will contain further instructions and a link to create a new password and disable the old 2FA.
This process can take anywhere from a few hours to a few business days, but it is the only way forward.
4. A Note on Urgency for Your Clients
While you are waiting, the best thing you can do for your business is to manage client expectations. Transparency is key.
Inform your clients immediately. Tell them that your account has been temporarily locked for a security review. Use a professional and reassuring tone.
Give them a timeline. Let them know that you have initiated the official recovery process with Meta and that it may take a few business days. This buys you time and shows them you are on top of the problem.
This process is the only official, supported way to bypass 2FA when you don't have access to your phone number. It is frustrating and can feel slow, but it's designed to protect your account. Follow these steps, manage your clients' expectations, and you should be able to get back online.